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The two giants of electronic measurement, Keysight (direct heir to HP and Agilent) and Teledyne LeCroy, For decades, these instruments have played a central role in R&D, teaching and metrology laboratories. But while their instruments may seem comparable, their philosophies and strengths differ profoundly. This article will help you to understand their specific features, so that you can make an informed choice without confusing brands, generations and models.
From HP to Keysight: the continuity of a benchmark
Oscilloscopes HP, become Agilent, then Keysight Technologies in 2014, embody a rare technological continuity. The brand retains the heritage of HP's analogue genius: precision, stability and signal fidelity. Engineers appreciate the reliability of the measurement, the robustness of the equipment and the clarity of the interface, designed for applied research.
Keysight oscilloscopes are distinguished by :
- a measurement accuracy exceptional on low amplitudes ;
- from bandpass filters precise and adjustable to isolate useful signals from noise; ;
- a temporal stability and a remarkably consistent release; ;
- a fluid ergonomics, without unnecessary software overlay.
These qualities make the models MSO9404A, MSO9254A, DSOX3054A or MSOX4024A trusted references for R&D, RF testing and design validation.
Teledyne LeCroy: the power of correlation and high resolution
Founded on a culture of software innovation, Teledyne LeCroy has always focused on depth of analysis and multi-channel reading. Where Keysight focuses on signal purity, Teledyne LeCroy excels in correlation and interpretation.
The oscilloscopes in the HDO offer :
- a 12-bit resolution, ideal for power signals and sensitive measurements; ;
- a extended memory depth, making it easier to analyse long captures; ;
- a integrated decoding protocols (CAN, I²C, SPI, UART, Power) ;
- high-performance FFT, jitter and power analysis tools.
Designed for R&D engineers, these instruments can be used to interpret several signals simultaneously and document laboratory tests efficiently.
Comparison table and selection criteria
RF environments demand high bandwidth, perfect synchronisation and phase accuracy. In this field, Keysight and Teledyne LeCroy stand out for the way they manage speed and fidelity.
| Model | Bandwidth | Resolution | Highlights | Ideal for |
|---|---|---|---|---|
| Keysight MSO9404A | 4 GHz | 8 bits | Time stability, phase accuracy | RF, microwave |
| Teledyne LeCroy HDO6104A | 1 GHz | 12 bits | Memory depth, FFT analysis | Medium band RF |
In short, Keysight ensures the rigour of the signal at high frequencies, while Teledyne LeCroy provides a more readable and detailed analysis of waveforms.
Case 2: mixed signals (CAN, I²C, SPI)
In embedded electronics design, the ability to observe several protocols in parallel is becoming essential. These oscilloscopes meet this need by offering advanced decoding and correlation tools.
| Model | Tracks | Bandwidth | Special features | Usage |
|---|---|---|---|---|
| Keysight MSO9254A | 4 | 2.5 GHz | Logic protocol decoding | Onboard R&D |
| Teledyne LeCroy HDO8058A | 8 | 500 MHz | Multi-bus correlation | Test benches |
Teledyne LeCroy takes the lead in multi-channel visualisation and cross-correlation, while Keysight maintains a clear advantage in speed and temporal stability.
Read: Refurbished spectrum analyser: comparison for R&D telecom engineers
A further insight into how the Keysight and Teledyne approaches extend into RF analysis and high-precision measurements.
Case 3: R&D and teaching
Teaching and R&D laboratories are looking for versatile, intuitive equipment that balances performance and pedagogy. These models illustrate this approach.
| Model | Bandwidth | Resolution | Tracks | Usage |
|---|---|---|---|---|
| Keysight DSOX3054A / MSOX4024A | 500 MHz-1 GHz | 8 bits | 4 | General lab |
| Teledyne LeCroy HDO8108 | 1 GHz | 12 bits | 8 | Technical teaching, multi-signal correlation |
Keysight offers a robust and straightforward interface, perfect for routine work or quick validations, while Teledyne LeCroy offers in-depth analysis tools and a more didactic interface.
These comparisons show that the choice depends more on the type of signal and work context logo on the façade.
The bandpass filter, the key parameter for complex signals
Le bandpass filter determines an oscilloscope's ability to distinguish a real signal from noise. On Keysight models, filtering is analogue and progressive: it protects signal fidelity even at high frequencies. With Teledyne LeCroy, it acts mainly as a digital post-processor, allowing more information to be displayed at once.
Setting the bandwidth correctly means avoiding distortion of transient signals and guaranteeing usable measurements, particularly for jitter or fast pulses.
How do you choose according to your business context?
Before comparing models, it's important to look at the type of signals you are processing and the environment in which the oscilloscope will be used. The needs of a COFRAC laboratory, an R&D team or a maintenance workshop are not the same. Here are the most common configurations and the resulting choice:
| Context | Recommendation |
|---|---|
| Metrology / COFRAC | Keysight: ISO 17025 traceability, signal stability. |
| R&D electronics / RF | Teledyne LeCroy: multi-channel correlation, FFT analysis. |
| Technical education | Teledyne LeCroy: educational interface and high resolution. |
| Industrial maintenance | Keysight: robust and responsive. |
Read: How to choose a reconditioned oscilloscope: 5 mistakes not to make
A clear, unbiased guide to avoiding common pitfalls when comparing generations, resolutions, bandwidth and actual usage.
Reconditioned vs. used. It's the technical difference that makes all the difference
An oscilloscope used is not an oscilloscope reconditioned. At Axitest, each device is :
- tested and verified according to protocols ISO 17025 ;
- controlled by the metrology laboratory Menova accredited COFRAC (n° 2-6760) ;
- delivered ready to use, with warranty up to 12 months depending on conditions.
Unlike second-hand measuring equipment, reconditioned industrial equipment is more than just being put back on the market. It represents a rational and sustainable choice, guaranteeing the performance and traceability of a verified instrument.
Refurbished Axitest, a guarantee of security for your choice
- ISO 17025 verification by an independent Menova laboratory.
- Warranty up to 12 months depending on conditions.
- Fast or immediate availability, short lead times.
- Technical support and guidance from specialist engineers.
FAQ
01
Are Keysight, Agilent and HP oscilloscopes identical?Yes, HP gave birth to Agilent, then Keysight. The oscilloscope ranges retain the same hardware and the same reliability, only the brand name has changed.
02
Do Teledyne LeCroy oscilloscopes accept old probes?The majority of HDO and WaveRunner models are compatible with standard BNC and SMA probes. Axitest can supply the necessary adapters.
03
Are the oscilloscopes checked before shipment?Yes. Before each shipment, a full verification is carried out in the COFRAC-accredited Menova laboratory (№2-6760), and a verification report complying with ISO 17025 is systematically provided.
04
Are products shipped from France?Yes, all reconditioned oscilloscopes are prepared and dispatched from Axitest's Saint-Maur-des-Fossés site.
05
What budget should you allow for a reconditioned oscilloscope?On average 30 to 60 % cheaper than an equivalent new one, with the same accuracy and a warranty of up to 12 months.
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